<div class="boundary solution-thumb">
    <div class="iconfont icon-polygonline"></div>
</div>
<div class="boundary boundary-selecting solution-thumb">
    <div class="layui-icon layui-icon-loading layui-icon layui-anim layui-anim-rotate layui-anim-loop"></div>
</div>
<div id="boundary-newone" class="boundary">
    <div class="layui-icon layui-icon-add-1"></div>
</div>
